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Intel 4040

The Intel 4040 was the successor to the Intel 4004. It was introduced in 1974.

New Features

  • Interrupt
  • Single Step

Extensions

  • Instruction Set expanded to 60 instructions
  • Program memory expanded to 8K bytes
  • Registers expanded to 24
  • Subroutine stack expanded to 7 levels deep

New Support chips

  • 4201 - Clock Generator
  • 4308 - 1K byte ROM
  • 4207 - General Purpose byte Output port
  • 4209 - General Purpose byte Input port
  • 4211 - General Purpose byte I/O port
  • 4289 - Standard Memory Interface (replaces 4008/4009)
  • 4702 - 256 byte UVEPROM
  • 4316 - 2K byte ROM
  • 4101 - 256 4-bit word RAM



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